Exploring the behaviour of luminescence signals from feldspars: Implications for the single aliquot regenerative dose protocol

Colarossi, Debra; Duller, G.A.T.; Roberts, Helen M.

doi:10.1016/j.radmeas.2017.07.005

Cited by 58 publications

(25 citation statements)

References 32 publications

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“…; Colarossi et al . ). Figure B shows pIRIR 290 laboratory dose response curves up to 5000 Gy on sample BAT‐1.19A using different test doses: 200 Gy (11% of De), 400 Gy (22% of De) and 800 Gy (44% of De).…”

Section: Resultsmentioning

confidence: 97%

Testing polymineral post‐IR IRSLand quartzSAR‐OSLprotocols on Middle to Late Pleistocene loess at Batajnica, Serbia

Avram

Constantin

Vereș

et al. 2020

Boreas

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The loess–palaeosol sequence of Batajnica (Vojvodina region, Serbia) is considered as one of the most complete and thickest terrestrial palaeoclimate archives for the Middle and Late Pleistocene. In order to achieve a numerical chronology for this profile, four sets of ages were obtained on 18 individual samples. Equivalent doses were determined using the SAR protocol on fine (4–11 μm) and coarse (63–90 μm) quartz fractions, as well as on polymineral fine grains by using two elevated temperature infrared stimulation methods, pIRIR290 and pIRIR225. We show that the upper age limit of coarse quartz OSL and polymineral pIRIR290 and pIRIR225 techniques is restricted to the Last Glacial/Interglacial cycle due to the field saturation of the natural signals. Luminescence ages on coarse quartz, pIRIR225 and pIRIR290 polymineral fine grains are in general agreement. Fine quartz ages are systematically lower than the coarse quartz and pIRIR ages, the degree of underestimation increasing with age. Comparison between natural and laboratory dose response curves indicate the age range over which each protocol provides reliable ages. For fine and coarse quartz, the natural and laboratory dose response curves overlap up to ~150 and ~250 Gy, respectively, suggesting that the SAR protocol provides reliable ages up to c. 50 ka on fine quartz and c. 100 ka on coarse quartz. Using the pIRIR225 and pIRIR290 protocols, equivalent doses up to ~400 Gy can be determined, beyond which in the case of the former the natural dose response curve slightly overestimates the laboratory dose response curve. Our results suggest that the choice of the mineral and luminescence technique to be used for dating loess sediments should take into consideration the reported limited reliability.

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Section: Resultsmentioning

confidence: 97%

Testing polymineral post‐IR IRSLand quartzSAR‐OSLprotocols on Middle to Late Pleistocene loess at Batajnica, Serbia

Avram

Constantin

Vereș

et al. 2020

Boreas

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“…Table 2) are unlikely to be the source of a-value variations between the two laboratories, because β-regeneration doses and hence signal intensities were usually low. Therefore, pIRIR 290 signals always reached instrumental background levels at the end of a regenerative measurement and signal carry-over into the test dose cycle as observed by Colarossi et al (2018) appears improbable.…”

Section: Discussionmentioning

confidence: 92%

Is there a common alpha-efficiency in polymineral samples measured by various infrared stimulated luminescence protocols?

2018

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Dating of polymineral silt-sized samples by use of post-infrared infrared stimulated luminescence (pIRIR) protocols at elevated temperature has recently gained attraction due to assumed lower rates of anomalous fading. The α-efficiency (or a-value) associated with the pIRIR signals as an integral part of age calculation has, however, not yet been sufficiently constrained. Here we present a set of 65 a-values determined for 47 samples collected across Europe with two different IRSL protocols in two laboratories. By testing the basic preconditions for application of the single-aliquot regeneration (SAR) procedure to constrain a-values and by comparing SAR results to a-values obtained by multiple-aliquot protocols, we demonstrate that SAR-derived a-values are reliable for the majority of samples. While aliquot size and signal resetting mode prior to α-regeneration do not appear to affect the resulting a-value, we detected significant differences in mean a-values measured in the two laboratories. For the pIRIR290 signal, a-values average to 0.085 ± 0.010 (Bayreuth) and 0.101 ± 0.014 (Cologne), while a modified SAR protocol yields 0.081 ± 0.008 (Bayreuth). Whereas provenance-specific differences in a-values might be masked by overall scatter, systematic offsets between laboratories are attributed to technical issues such as heater and source calibration. Based on the present data set, use of the same routine dating equipment is strongly advised for both dose and a-value measurements.

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“…It has not previously been clear how this resetting can be checked routinely. However, Colarossi et al (2018) Fig. 1 shows the results of this test for the two VSL protocols investigated in this study.…”

Section: Signal Transfer During Measurementmentioning

confidence: 99%

Testing single aliquot regenerative dose (SAR) protocols for violet stimulated luminescence

Colarossi

Chapot

Duller

et al. 2018

Radiation Measurements

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Highlights:• Compared two single aliquot regenerative dose protocols for VSL signal • Protocols assessed to minimise recuperation and optimise signal depletion • Partial success in dose recovery of ~400 Gy using post-blue VSL signal • VSL signal gives 50 -79 % underestimation of the expected D e Abstract Basic assumptions of the single aliquot regenerative dose (SAR) protocol are tested using the violet stimulated luminescence (VSL) signal from quartz. The VSL signal is shown to be reduced to a sufficiently low background level between SAR steps, and the SAR protocol appears to adequately correct for sensitivity changes during measurement. The VSL SAR protocol can recover a large (405 Gy) laboratory beta dose within uncertainties, however the mean value for the dose recovery ratio is commonly 0.8 or less. This poor behaviour is echoed in the measurements of equivalent dose (D e ) for a sample with an expected D e of ~354 Gy, which underestimates D e by 50 -70 %. Further investigations are required to understand the mechanisms underlying these underestimations in VSL SAR D e values.

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Exploring the behaviour of luminescence signals from feldspars: Implications for the single aliquot regenerative dose protocol

Cited by 58 publications

References 32 publications

Testing polymineral post‐IR IRSLand quartzSAR‐OSLprotocols on Middle to Late Pleistocene loess at Batajnica, Serbia

Testing polymineral post‐IR IRSLand quartzSAR‐OSLprotocols on Middle to Late Pleistocene loess at Batajnica, Serbia

Is there a common alpha-efficiency in polymineral samples measured by various infrared stimulated luminescence protocols?

Testing single aliquot regenerative dose (SAR) protocols for violet stimulated luminescence

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